This AOD spacer plate / block plate, fits 11-7/16 bolt pattern torque converter, 164 tooth flywheel.
C4 , C6, AOD automatic bell housings.
Fits 6 bolt bell housing 289 and all ,302, 5.0, 351W, 351C
2 bottom holes are approx. 12-7/16 center
Does NOT fit C4 bellhousings that use 10-1/2 bolt pattern torque converters and 157 tooth flywheels